зеркало из https://github.com/mozilla/gecko-dev.git
161 строка
4.3 KiB
C++
161 строка
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsScreenGtk.h"
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#include <gdk/gdk.h>
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#ifdef MOZ_X11
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#include <gdk/gdkx.h>
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#include <X11/Xatom.h>
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#endif
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#include <gtk/gtk.h>
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nsScreenGtk :: nsScreenGtk ( )
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: mScreenNum(0),
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mRect(0, 0, 0, 0),
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mAvailRect(0, 0, 0, 0)
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{
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}
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nsScreenGtk :: ~nsScreenGtk()
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{
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}
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NS_IMETHODIMP
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nsScreenGtk :: GetRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight)
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{
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*outLeft = mRect.x;
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*outTop = mRect.y;
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*outWidth = mRect.width;
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*outHeight = mRect.height;
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return NS_OK;
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} // GetRect
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NS_IMETHODIMP
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nsScreenGtk :: GetAvailRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight)
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{
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*outLeft = mAvailRect.x;
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*outTop = mAvailRect.y;
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*outWidth = mAvailRect.width;
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*outHeight = mAvailRect.height;
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return NS_OK;
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} // GetAvailRect
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NS_IMETHODIMP
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nsScreenGtk :: GetPixelDepth(int32_t *aPixelDepth)
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{
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GdkVisual * visual = gdk_screen_get_system_visual(gdk_screen_get_default());
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*aPixelDepth = gdk_visual_get_depth(visual);
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return NS_OK;
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} // GetPixelDepth
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NS_IMETHODIMP
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nsScreenGtk :: GetColorDepth(int32_t *aColorDepth)
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{
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return GetPixelDepth ( aColorDepth );
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} // GetColorDepth
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void
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nsScreenGtk :: Init (GdkWindow *aRootWindow)
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{
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// We listen for configure events on the root window to pick up
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// changes to this rect. We could listen for "size_changed" signals
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// on the default screen to do this, except that doesn't work with
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// versions of GDK predating the GdkScreen object. See bug 256646.
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mAvailRect = mRect = nsIntRect(0, 0, gdk_screen_width(), gdk_screen_height());
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#ifdef MOZ_X11
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// We need to account for the taskbar, etc in the available rect.
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// See http://freedesktop.org/Standards/wm-spec/index.html#id2767771
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// XXX do we care about _NET_WM_STRUT_PARTIAL? That will
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// add much more complexity to the code here (our screen
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// could have a non-rectangular shape), but should
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// lead to greater accuracy.
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long *workareas;
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GdkAtom type_returned;
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int format_returned;
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int length_returned;
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#if GTK_CHECK_VERSION(2,0,0)
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GdkAtom cardinal_atom = gdk_x11_xatom_to_atom(XA_CARDINAL);
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#else
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GdkAtom cardinal_atom = (GdkAtom) XA_CARDINAL;
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#endif
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gdk_error_trap_push();
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// gdk_property_get uses (length + 3) / 4, hence G_MAXLONG - 3 here.
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if (!gdk_property_get(aRootWindow,
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gdk_atom_intern ("_NET_WORKAREA", FALSE),
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cardinal_atom,
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0, G_MAXLONG - 3, FALSE,
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&type_returned,
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&format_returned,
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&length_returned,
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(guchar **) &workareas)) {
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// This window manager doesn't support the freedesktop standard.
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// Nothing we can do about it, so assume full screen size.
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return;
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}
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// Flush the X queue to catch errors now.
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gdk_flush();
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if (!gdk_error_trap_pop() &&
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type_returned == cardinal_atom &&
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length_returned && (length_returned % 4) == 0 &&
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format_returned == 32) {
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int num_items = length_returned / sizeof(long);
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for (int i = 0; i < num_items; i += 4) {
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nsIntRect workarea(workareas[i], workareas[i + 1],
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workareas[i + 2], workareas[i + 3]);
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if (!mRect.Contains(workarea)) {
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// Note that we hit this when processing screen size changes,
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// since we'll get the configure event before the toolbars have
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// been moved. We'll end up cleaning this up when we get the
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// change notification to the _NET_WORKAREA property. However,
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// we still want to listen to both, so we'll handle changes
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// properly for desktop environments that don't set the
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// _NET_WORKAREA property.
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NS_WARNING("Invalid bounds");
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continue;
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}
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mAvailRect.IntersectRect(mAvailRect, workarea);
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}
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}
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g_free (workareas);
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#endif
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}
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#ifdef MOZ_X11
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void
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nsScreenGtk :: Init (XineramaScreenInfo *aScreenInfo)
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{
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nsIntRect xineRect(aScreenInfo->x_org, aScreenInfo->y_org,
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aScreenInfo->width, aScreenInfo->height);
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mScreenNum = aScreenInfo->screen_number;
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mAvailRect = mRect = xineRect;
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}
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#endif
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